\select@language {english}
\select@language {dutch}
\contentsline {chapter}{Inhoudsopgave}{ii}{section*.1}
\contentsline {chapter}{\numberline {1}Inleiding}{1}{chapter.1}
\contentsline {section}{\numberline {1.1}Situering}{1}{section.1.1}
\contentsline {subsection}{\numberline {1.1.1}GPS}{1}{subsection.1.1.1}
\contentsline {subsection}{\numberline {1.1.2}Substraten}{3}{subsection.1.1.2}
\contentsline {subsubsection}{Polyimide}{3}{section*.3}
\contentsline {subsubsection}{Aramide}{3}{section*.4}
\contentsline {subsubsection}{Geel schuim}{4}{section*.5}
\contentsline {section}{\numberline {1.2}Doelstellingen}{4}{section.1.2}
\contentsline {subsection}{\numberline {1.2.1}Het ontwerp van een actieve, flexibele, circulair gepolariseerde GPS-antenne}{4}{subsection.1.2.1}
\contentsline {chapter}{\numberline {2}Theoretische achtergrond}{5}{chapter.2}
\contentsline {section}{\numberline {2.1}CPW en microstrip}{5}{section.2.1}
\contentsline {subsection}{\numberline {2.1.1}CPW}{5}{subsection.2.1.1}
\contentsline {section}{\numberline {2.2}Patchantennes}{6}{section.2.2}
\contentsline {subsection}{\numberline {2.2.1}Rechthoekige patchantennes}{7}{subsection.2.2.1}
\contentsline {subsection}{\numberline {2.2.2}Voedingstructuren}{7}{subsection.2.2.2}
\contentsline {subsubsection}{Inset-fed patch antenna}{7}{section*.6}
\contentsline {subsubsection}{Aperture coupled patch antenna}{8}{section*.7}
\contentsline {section}{\numberline {2.3}Aanpassing}{9}{section.2.3}
\contentsline {section}{\numberline {2.4}Polarisatie}{9}{section.2.4}
\contentsline {subsection}{\numberline {2.4.1}Axiale ratio}{10}{subsection.2.4.1}
\contentsline {section}{\numberline {2.5}Lage ruis versterkers (LNA)}{10}{section.2.5}
\contentsline {subsection}{\numberline {2.5.1}pHEMT}{11}{subsection.2.5.1}
\contentsline {subsection}{\numberline {2.5.2}Stabiliteit}{11}{subsection.2.5.2}
\contentsline {subsection}{\numberline {2.5.3}Ruis van een tweepoort}{12}{subsection.2.5.3}
\contentsline {subsection}{\numberline {2.5.4}Lineariteit}{12}{subsection.2.5.4}
\contentsline {section}{\numberline {2.6}Kwadratuur hybride koppelaar}{13}{section.2.6}
\contentsline {section}{\numberline {2.7}Simulatie}{14}{section.2.7}
\contentsline {subsection}{\numberline {2.7.1}Algemeenheden}{14}{subsection.2.7.1}
\contentsline {subsection}{\numberline {2.7.2}Simulatie van CPW}{14}{subsection.2.7.2}
\contentsline {chapter}{\numberline {3}Lineair gepolariseerde patchantennes}{15}{chapter.3}
\contentsline {section}{\numberline {3.1}Geel schuim: LP-ACPA}{15}{section.3.1}
\contentsline {subsection}{\numberline {3.1.1}Ontwerp}{15}{subsection.3.1.1}
\contentsline {subsection}{\numberline {3.1.2}Resultaten}{17}{subsection.3.1.2}
\contentsline {subsection}{\numberline {3.1.3}Conclusie}{17}{subsection.3.1.3}
\contentsline {section}{\numberline {3.2}Aramide: LP-IFPA}{17}{section.3.2}
\contentsline {subsection}{\numberline {3.2.1}Ontwerp}{17}{subsection.3.2.1}
\contentsline {subsection}{\numberline {3.2.2}Resultaten}{19}{subsection.3.2.2}
\contentsline {subsection}{\numberline {3.2.3}Conclusie}{19}{subsection.3.2.3}
\contentsline {chapter}{\numberline {4}Circulair gepolariseerde apertuurgekoppelde patch antennes}{21}{chapter.4}
\contentsline {section}{\numberline {4.1}CPW-ontwerp}{21}{section.4.1}
\contentsline {subsection}{\numberline {4.1.1}Zonder directionele koppelaar}{21}{subsection.4.1.1}
\contentsline {subsubsection}{Antenne met twee gekruiste slots}{22}{section*.8}
\contentsline {subsubsection}{Antenne met \'e\'en slot onder 45 $^\circ $}{24}{section*.9}
\contentsline {subsubsection}{Antenne met ronde patch met twee gekruiste slots}{24}{section*.10}
\contentsline {subsubsection}{Antenne met ronde patch en 1 gekruist slot}{25}{section*.11}
\contentsline {subsection}{\numberline {4.1.2}Met directionele koppelaar}{26}{subsection.4.1.2}
\contentsline {subsubsection}{Antenne met gekruiste slots}{27}{section*.12}
\contentsline {subsubsection}{Antenne met niet-gekruiste slots}{27}{section*.13}
\contentsline {subsection}{\numberline {4.1.3}Verklaring omschakeling CPW naar microstrip}{33}{subsection.4.1.3}
\contentsline {section}{\numberline {4.2}Microstrip-ontwerp}{34}{section.4.2}
\contentsline {subsection}{\numberline {4.2.1}Zonder directionele koppelaar}{34}{subsection.4.2.1}
\contentsline {subsubsection}{Antenne met gekruiste slots}{34}{section*.14}
\contentsline {subsection}{\numberline {4.2.2}Met directionele koppelaar}{35}{subsection.4.2.2}
\contentsline {subsubsection}{Antenne met gekruiste slots}{35}{section*.15}
\contentsline {subsubsection}{Antenne met niet-gekruiste slots}{36}{section*.16}
\contentsline {section}{\numberline {4.3}LNA}{42}{section.4.3}
\contentsline {subsubsection}{Transistor keuze}{44}{section*.17}
\contentsline {subsubsection}{Instel circuit}{45}{section*.18}
\contentsline {subsubsection}{Stabiliteit, lineariteit en optimale ruis aanpassing}{46}{section*.19}
\contentsline {subsubsection}{LNA na herontdekking van de di\"elektrische constante van aramide}{49}{section*.20}
\contentsline {chapter}{\numberline {5}Productie proces}{51}{chapter.5}
\contentsline {section}{\numberline {5.1}Maskers exporteren uit ADS Momentum}{52}{section.5.1}
\contentsline {section}{\numberline {5.2}Plaatsen van een deel van de componenten in de cleanrooms}{52}{section.5.2}
\contentsline {section}{\numberline {5.3}Strijken van de substraten en prikken van de vias}{53}{section.5.3}
\contentsline {chapter}{\numberline {6}Meetresultaten}{54}{chapter.6}
\contentsline {section}{\numberline {6.1}De LNA}{54}{section.6.1}
\contentsline {subsection}{\numberline {6.1.1}LNA zonder SAW}{54}{subsection.6.1.1}
\contentsline {subsubsection}{Enkele capaciteiten vervangen door soortgelijke capaciteiten}{54}{section*.21}
\contentsline {subsubsection}{Gerbuik van de gesimuleerde capaciteiten}{56}{section*.22}
\contentsline {subsection}{\numberline {6.1.2}LNA met SAW}{56}{subsection.6.1.2}
\contentsline {section}{\numberline {6.2}De antenne zonder LNA}{58}{section.6.2}
\contentsline {section}{\numberline {6.3}De antenne met LNA zonder SAW}{58}{section.6.3}
\contentsline {section}{\numberline {6.4}De antenne met LNA en SAW}{58}{section.6.4}
\contentsline {chapter}{\numberline {7}Besluit en toekomstperspectieven}{59}{chapter.7}
\contentsline {chapter}{Bibliografie}{60}{chapter*.23}
\contentsline {chapter}{L"yst van figuren}{63}{chapter*.24}
\contentsline {chapter}{L"yst van tabellen}{66}{chapter*.25}
